Check out kopia.io is a backup software that uses S3 to store files by blocks or pages. You can browse, search and sort the files and directories of the differ

Check out kopia.io is a backup software that uses S3 to store files by blocks or pages. You can browse, search and sort the files and directories of the different snapshot or versions of the file. I love it ! For me it's a file system in S3. Bonus: you must use a key, to encrypt the files.